Naming Compounds Day 2 Working backwards: name to formula It’s possible to determine a formula from a name E.g. What is the formula of sodium oxide?

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Presentation on theme: "Naming Compounds Day 2 Working backwards: name to formula It’s possible to determine a formula from a name E.g. What is the formula of sodium oxide?"— Presentation transcript:

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Naming Compounds Day 2

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Working backwards: name to formula It’s possible to determine a formula from a name E.g. What is the formula of sodium oxide? To get the answer, first write the valences: Na 1 O 2  Na 2 O What is the formula of copper(II) oxide? Cu 2 O 2  Cu 2 O 2  CuO For covalent compounds, simply use the prefixes to tell you the number of each element: What is the formula for dinitrogen trioxide? N2O3N2O3 Give formulae for: lithium sulfide, dinitrogen monoxide, lead(IV) sulfate

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Bases contain an OH group C 6 H 12 O 6 does not have an OH group If an OH group is present it will be clearly indicated: e.g. NaOH, Ca(OH) 2 Also notice that bases have a metal (or positive ion such as NH 4 + at their beginning) Bases are named like other ionic compounds: +ve is named first, followed by the polyatomic ion Naming Bases - calcium hydroxide - copper(I) hydroxide - Al(OH) 3 - NH 4 OH Ca(OH) 2 CuOH aluminum hydroxide ammonium hydroxide